Rent day, on purpose
Rent is the same day every month until it is not in your head. A monthly text a couple of days early beats a late fee.
Set it for two days before
If rent is due on the 1st, remind yourself on the 28th or 29th. Say “Confirm rent sent” in the message if you already autopay, so you catch a failed transfer.
Roommates
Each person needs their own phone number. RemindViaText is one reminder per free account, which is enough for the rent ping.